Everyone has a subway horror story. In addition to the day-to-day awfulness of crowded rush hour commutes, there are occasional subway parties, flashers, seats filled with mysterious liquids and, sometimes, there's even poo on the floor. But all of that pales in comparison to life on Chicago's Blue Line, where the poo doesn't just harmlessly lie on the floor; instead, as a young Chicago woman recently discovered, it's flung at innocent passengers while inside of a sock.

"He had a sock full of his poop on me," said the 21-year-old college student. "It was everywhere; on my face, my hair, my clothes."

Such was the plight of the unnamed woman who, last week, was attacked by the still at-large assailant. The woman was traveling from her job in Oak Park into the city when the poop thrower boarded her car.

"I wasn't really paying attention," the woman said. In fact, she was on looking at her phone and texting, when the criminal attacked at the next stop without saying a word.

She screamed and, along with a witness, attempted to follow the man, but he was too quick, disappearing before police arrived. For their part, police did look for the man "in and around a gas station," but had no luck. They do, however, have a photo of the perp, who the woman described as "no older than mid-20s, average build, with facial hair above the mouth and on the chin."

"We have photos of the offender and we're seeking to identify him," [a police spokesman] said of images obtained from the CTA. "We've reached out to other [police] agencies and have issued a bulletin."

Small consolation to the woman, though, who said the incident was one of the worst moments of her life. "It was like the biggest degradation I've ever [experienced]. I wish he had just hit me," she said, before adding, grossly, "The worst part is nobody had anything to wipe my face with."